Blind fastener



FIG. 1 is a left-top-front perspective view of the blind fastener;

FIG. 2 is a right-bottom-rear perspective view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a top view thereof;

FIG. 6 is a right side view thereof;

FIG. 7 is a rear view thereof; and,

FIG. 8 is a bottom view thereof.

The broken lines in the drawings illustrate portions of the blind fastener and form no part of the claimed design. 

CLAIM The ornamental design for a blind fastener, as shown and described. 